一个月内重新激活

Question

我需要找到重新激活一个月的用户。之前开具发票，然后在当月停止开具发票，然后又开始开具发票的用户数量。下面的查询给了我一个月的期望结果。

    SELECT COUNT(DISTINCT USERID)
    FROM (
        SELECT USERID
        ,MIN(DATE ( INVOICE_DT)) AS ADD_ON_GA_DATE
        FROM INVOICE_D AS ID
        WHERE 
        USERID IN (
                    (
                    SELECT USERID
                    FROM INVOICE_D AS ID
                    WHERE INVOICE_AMT > 0
                    AND LAST_DAY(INVOICE_DT) = ADD_MONTHS(LAST_DAY(CURRENT_DATE - 1), - 1)
                    GROUP BY USERID
                    ) 
                    MINUS
                   (SELECT USERID
                    FROM INVOICE_D AS ID
                    WHERE LAST_DAY(INVOICE_DT)  = ADD_MONTHS(LAST_DAY(CURRENT_DATE - 1), - 2) 
                    GROUP BY USERID)
                  )
        GROUP BY USERID
        ) AS TOTAL_POP
    WHERE LAST_DAY(ADD_ON_GA_DATE) != ADD_MONTHS(LAST_DAY(CURRENT_DATE - 1), - 1)
   ;

我希望此查询计算除当前月份以外的所有月份（不包括 2020 年 9 月）。这给了我所有月份的数据，其中用户在当月活跃，而不是在上个月活跃。现在，从这个列表中，我只希望那些在所有较早月份以及当前月份都活跃的用户。不确定我需要在哪里添加过滤器以排除当前月份。

WITH MONTH_SUMMARY AS 
(
  SELECT USERID
  ,TO_CHAR(INVOICE_DT,'YYYY-MM') "INVOICE_MONTH"
  ,TO_CHAR(ADD_MONTHS(INVOICE_DT,-1),'YYYY-MM') "PREV_MONTH"
  ,SUM(INVOICE_AMT) "MONTHLY_TOTAL"
  FROM INVOICE_DATA
  WHERE INVOICE_DT >= TRUNC(ADD_MONTHS(current_date(),-13),'MONTH') 
  GROUP BY 1,2,3
),

USER_DATA AS 
  (
  SELECT USERID, INVOICE_MONTH, MONTHLY_TOTAL
  FROM MONTH_SUMMARY MS_THIS
  WHERE NOT EXISTS 
  (
    SELECT USERID
    FROM MONTH_SUMMARY MS_NEXT
    WHERE 
      MS_THIS.USERID = MS_NEXT.USERID AND
      MS_THIS.NEXT_MONTH = MS_NEXT.INVOICE_MONTH
   )
   AND MS_THIS.INVOICE_MONTH < TO_CHAR(current_date(),'YYYY-MM') 
)
SELECT INVOICE_MONTH, COUNT(DISTINCT USERID) "USER_COUNT"
FROM USER_DATA
GROUP BY INVOICE_MONTH
ORDER BY INVOICE_MONTH
 ;
 

Answer 1

这个 SQL 可能会让你接近你想要的：

-- Create a CTE that holds monthly summaries per user; adjust as necessary to hold the data required in the final output
-- Last day of month used, rather than just the month, to make subsequent date logic easier
WITH MONTHLY_SUMMARY AS (
    SELECT USERID,
            LAST_DAY(INVOICE_DT) AS INVOICE_MONTH,
            SUM(INVOICE_AMT) MONTHLY_AMT
    FROM INVOICE_D    
    GROUP BY 1,2
    HAVING MONTHLY_AMT > 0 -- Only include user/month combinations that have an invoice amount. Only required if zero-value invoices exists. Would need adjusting if +ve and -ve amounts exist that could sum to zero

)
--Main select
SELECT THIS_MONTH.INVOICE_MONTH, THIS_MONTH.USERID, THIS_MONTH.MONTHLY_AMT
FROM MONTHLY_SUMMARY THIS_MONTH
WHERE NOT EXISTS ( -- exclude records where there is an invoice amount for the same user in the previous month
    SELECT 1 FROM MONTHLY_SUMMARY LAST_MONTH
    WHERE THIS_MONTH.USERID = LAST_MONTH.USERID
    AND ADD_MONTHS(THIS_MONTH.INVOICE_MONTH,-1) = LAST_MONTH.INVOICE_MONTH
)
AND EXISTS ( -- include records where there is an invoice amount for the same user in month 2, or more, priior to this month
    SELECT 1 FROM MONTHLY_SUMMARY LAST_MONTH
    WHERE THIS_MONTH.USERID = LAST_MONTH.USERID
    AND LAST_MONTH.INVOICE_MONTH <= ADD_MONTHS(THIS_MONTH.INVOICE_MONTH,-2) 
)
AND LAST_DAY(CURRENT_DATE) > THIS_MONTH.INVOICE_MONTH -- EXCLUDE THE CURRENT MONTH
AND THIS_MONTH.INVOICE_MONTH <> (SELECT MIN(INVOICE_MONTH) FROM MONTHLY_SUMMARY) -- Exclude 1st month in dataset
ORDER BY THIS_MONTH.INVOICE_MONTH, THIS_MONTH.USERID
;